Picker for mechanical looms



Dec. 3, 1940. J PR1NA 2,223,857

PICKER FOR MECHANICAL LOOMS Fi1'ed Oct. 9, 1959 INVETORS JUAN PRIMA Y EXEQUIEL DELZAR 7 AT TRNEYS Patented Dec- 40 PATENT )FFICE 2,223,857 PICKER FOR MECHANICAL LOOMS Juan Prlna and Ezequiel Delzar, Buenos Aires, Argentina Application October 9, 1939. Serial No. 298,648 In Argentina August 12, 1939 2 Claims.

The present invention relates to weavins and in particular to the pickers used on mechanical looms for driving and stopping the shuttle.

Heretofore such pickers have been made prin- ,cipally of leather and have been so constructed as to require the replacement of the Whole picker when the strlking surface has become worn. Moreover, the known kinds of picker have a high coeflicient of friction since they are usually made lo of leather, and call for a considerable expenditure of energy for impellihg them between the picker guides and along the picker rod, and giving rise to considerable development of heat.

The main object of the present invention is to provide a new and improved type of picker which shall overcome all of the aforementioned objections.

A further object of the present invention is to provide a picker for mechanical looms, mainly lo constructed of metal and having greatly reduced bearing surfaces, lubricating means and an interchangeable striking surface.

A still further object of the present invention is to provide a metallic picker having reduced I5 bearing surfaces and independent lubricating means, in which the striking surface is readily interchangeable so that a worn striking surface may be rapidly replaced by a new one without involving thedestruction or discarding of the picker as a whole, means being also provided on the picker for securing thereto a striking surface protection member.

These and other objects and advantages of the present invention will be made more fully appar- I ent in the course of the following detailed description.

In the drawing: Flg. 1 is a side elevation of one embodiment of the metallic pickeraccording to the present ino vention. t

Fig. 2 is an end view of the novel picker. Flg. 3 is a section on the line IIIHI of Fig. 1.

Flg. 4 is a side elevation of a modified embodiment of the metallic picker.' a Fig. 5 is an end view of the embodiment of Fig. 4.

Fig. 6 is a section on the line VIVI of Fig. 4. Fig. 7 is a perspective view of the strlking surface protection member. o Fig. 8 is a perspective view of an lnterchangeable striking surface member, and

Flg. 9 is a side view of the lower portion of a metallic picker according to the present invention with a striking surface protection member I in position.

' the ends of the said body portion and through an intermediate lubricating chamber l6 having a bore IB of diameter greater than that of the rod l2 and preferably excentric thereto so as to form a crescent shaped space (Fig. 3) Which may be filled with solid or semisolid lubricant through a lubricating hole 22. From the body portion -l0 depends a carrier portion 24 which terminates in a picker head 26 and comprlses a plurality of ribs 28 which are perpendicular to the center line of the head portion and the narrow end surfaces of Which form contact surfaces adapted to engage the picker guides 30 shown dotted in Figs. 2 and 5. Some or all of the ribs 20 may be connected together by webs as shown at 32. At a point immediately below the head portion lll a passage 34 is formed by a cross rib 36, said passage being adapted to accommodate the picker bar 38. 5

The picker head 28 may be of any convenient cross section as for example semicircular or rectangular, and has at least one recess 40 parallel to the head portion lll said recess being adapted to receive a rubber member 42 the free end of 30 which 44 forms the striking surface.

In the example shown in Figs. 1, 2 and 3, two such recesses are provided so that the picker is double acting. Each recess communicates at its inner end with the atmosphere by means of an aperture 46 to allow air to escape when insertng the rubber members and likewise to enhance the cushioning effect.

Conveniently, the two recesses communicate with the same aperture 40 through an intercon- 40 necting passage 48.

In the emb0diment of Fig. 1, the recesses are formed by boring out the semicircular picker head 26, and sbstantially the whole length of the rubber members 42 is housed in the recesses. In Fig. 4, which shows a single acting picker according to the present ir1venton, the recess is rectangular and the depth thereof is less than the length of the rubber member (see Fig. 9). To support the protruding portion of the rubber 5 member, a. lip 50 is provided at the lower end of the picker head.

Figs. 4, 5 and 6 show likewise certain minor modifications which are applicable to both the embodments, The bearings l4 may be provided with a bush 52 to protect the picker structure itself from undue wear. Likewise lateral lugs 54 may be provided on the picker head to serve as supporting guides for a strlking surface protecting member 56 illustrated in Fig. 7, which consists of a plurality of pieces of leather 58 secured between the forward ends of metal arms ll as by means of tubular rivets 62, said arms being provided with a slot 84 adapted to fit over said lugs 54 and with rearward ends 65 adapted to overlap the rear end of the picker head and to be there secured to the corresponding portion of the other arm by wiring or the like. Said slots 64 are preferably of Width crosswise of said arms substantially equal to the Width of said lugs but are longer lengthwise of said arms than said lugs so as to allow of front-to-back play while preventing up-and-down rocking.

The parts 68 of the carrier portion of the picker which define laterally the passage 34, may be perforated as shown at 10 to receive anchoring means such as a cotter or split pin (not shown) to secure strips of leather 12 to the side surfaces of said passage whereby to reduce the Wear both on the picker bar and on said side surfaces.

Conveniently, the rubber member 42 for the picker of 'Fig; 4 has a reduced shank portion M adapted to fit in the recess and the main portion 16 thereof is shaped to fit the inside contours of the picker head.

The device is designed to operate in the usual manner, but it will be noted that the striking surfaces are replaceable upon wear, that the arca bearing on the guides 30 has been reduced While still giving a sufiiciently extensive contact to ensure satisfactory guiding, and the picker structure itself is constructed to have a life many times that of known structures.

We claim:

1. A picker for mechanical looms having a picker bar and a pair of spaced picker guides, said picker comprising a metallic body portion, alined bearings at the ends of said body portion, a lu bricating chamber in said body portion intermediate of and communicating with said bearlngs. a metallic carrier portion terminating in a picker head, depending from said body portion interrality of pieces of leather secured between the forward ends of the arms, a slot in each arm intermediate its ends, said slot being of width crosswise of the arms substantially equal to the Width of said Iugs and being longer lengthwise of said arms than said lugs, means on said rearward ends adapted to secure said arms to said picker head, an aperture in said picker head establishing communication between said recess and the atmosphere, and a passage in said carrier portion adapted to receive said picker bar, said ribs forming spaced contact surfaces adapted to engage said guides.

2. A picker for mechanical looms having a picker rod, a picker bar and a pair of spaced picker guides, said picker comprising a metallic member having a hollow portion for surrounding said picker rod, bushings at the opposite ends of said hollow portion forming bearings for engaging said rod and leaving a, lubricant chamber therebetween, a picker head portion, a ribbed portion intermediate said hollow portion and head portion defining a transverse recess for receiving said picker bar and having an adjacent portion extending between and engaging sa d spaced guides, a resilient cushion engaging a recess in said picker head portion, a protecting shoe for said resilient cushion having a leather striking surface, and side plates embracing said head, and lugs on said head engaging apertures in said side plates to secure said shoe to said head to permit a limited relative longitudinal movement thereof.

JUAN PRINA. EXEQUIEL DELZAR. 

